Piston anti-knock back assemblies

Details Piston anti-knock back assemblies Piston anti-knock back assemblies

1981-07-08

1983-04-26

Spar, Robert J.

Brakes

Wheel

Axially movable brake element or housing therefor

188196P, 29453, 291565R, 92 14, 92 23, 92 30, 92128, F16D 5502

Patent

active

043810470

ABSTRACT:
A piston anti-knock back assembly in a disc brake assembly having a brake actuator comprising a piston slidably mounted within a cylinder bore and operable to urge a fricton surface into contact with a rotary disc surface upon supply of hydraulic fluid under pressure to said cylinder bore, comprises an expanded resilient split ring in frictional contact with a main portion of the cylinder bore and loosely axially located in an annular piston groove adjacent a conical head of said piston. The resilient ring, when unexpanded, is a sliding fit within the main portion of the cylinder bore, and the outer peripheral portion of the resilient ring is shaped into a frustum of a hollow cone of sufficient depth that, when the ring is placed into contact with an end wall of the cylinder bore, the plane of the ring is spaced far enough away from the end wall to allow insertion of the conical head of the piston within the ring so as to expand the resilient ring up over the conical head portion until it snaps into position in said annular piston groove.

REFERENCES:
patent: 3326580 (1967-06-01), Munier et al.
patent: 3354992 (1967-11-01), Cook et al.
patent: 3495689 (1970-02-01), Peach

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